From e9ecbca70d28c775a9eeda7670e06443a1037d5b Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Sun, 10 May 2020 10:30:27 +0200
Subject: [PATCH] Fix error within error when limiting backtrace to 3 lines
 (#13120)

Fix #13086, close #13113
---
 app/lib/request.rb                         |  2 --
 app/lib/sidekiq_error_handler.rb           | 11 +++++++++++
 app/workers/activitypub/delivery_worker.rb | 10 +++-------
 3 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/app/lib/request.rb b/app/lib/request.rb
index c476e7785..247c32958 100644
--- a/app/lib/request.rb
+++ b/app/lib/request.rb
@@ -73,8 +73,6 @@ class Request
       response.body_with_limit if http_client.persistent?
 
       yield response if block_given?
-    rescue => e
-      raise e.class, e.message, e.backtrace[0]
     ensure
       http_client.close unless http_client.persistent?
     end
diff --git a/app/lib/sidekiq_error_handler.rb b/app/lib/sidekiq_error_handler.rb
index 8eb6b942d..b07817d45 100644
--- a/app/lib/sidekiq_error_handler.rb
+++ b/app/lib/sidekiq_error_handler.rb
@@ -1,13 +1,24 @@
 # frozen_string_literal: true
 
 class SidekiqErrorHandler
+  BACKTRACE_LIMIT = 3
+
   def call(*)
     yield
   rescue Mastodon::HostValidationError
     # Do not retry
+  rescue => e
+    limit_backtrace_and_raise(e)
   ensure
     socket = Thread.current[:statsd_socket]
     socket&.close
     Thread.current[:statsd_socket] = nil
   end
+
+  private
+
+  def limit_backtrace_and_raise(e)
+    e.set_backtrace(e.backtrace.first(BACKTRACE_LIMIT))
+    raise e
+  end
 end
diff --git a/app/workers/activitypub/delivery_worker.rb b/app/workers/activitypub/delivery_worker.rb
index 14e37dc34..60775787a 100644
--- a/app/workers/activitypub/delivery_worker.rb
+++ b/app/workers/activitypub/delivery_worker.rb
@@ -52,13 +52,9 @@ class ActivityPub::DeliveryWorker
       end
     end
 
-    begin
-      light.with_threshold(STOPLIGHT_FAILURE_THRESHOLD)
-           .with_cool_off_time(STOPLIGHT_COOLDOWN)
-           .run
-    rescue Stoplight::Error::RedLight => e
-      raise e.class, e.message, e.backtrace.first(3)
-    end
+    light.with_threshold(STOPLIGHT_FAILURE_THRESHOLD)
+         .with_cool_off_time(STOPLIGHT_COOLDOWN)
+         .run
   end
 
   def failure_tracker